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I. 1 WEAVER. ROLLS FOR ROLLING SWITCH POINTS.-

No. 428,580. Patented May 20, 1890.

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ROLLS FOR ROLLING SWITCH POINTS.

N0. 428,580. V If P%1 ented May 20, 1890.

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I. D. WEAVER. ROLLS FOR ROLLING SWITCH POINTS.

No. 428,580. Patented May 20, 1890.

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UNITED STATES PATENT OFFICE.

ISAAC D \VEAVER, OF LEBANON, PENNSYLVANIA, ASSIGNOR OF THREE- FOURTHS TO CHARLES M. BOIVMAN, JACOB M. SHENK, AND THOMAS EVANS, OF SAME PLACE.

ROLLS FOR ROLLING SWITCH-POINTS.

SPECIFICATION forming part of Letters Patent No. 428,580, dated May 20, 1890.

Application filed August 21, 1889. Serial No. 321,503- (M L) To all whom, it may concern: reduced to a completed or finished switch- Be it knownthatl, ISAAC D. WVEAVEmacitipoint. In Fig. lthe rolls are shown in posio zen of the United States, residing at Lebanon, tion for entering the metal to each pass sucin the county of Lebanon and State of Penncessively. The groove a, which forms the 5 sylvania, have invented certain new and flange of the switch-point,is of uniform depth useful Improvements in the Manufacture of throughout, or concentric to the axis of the Switch-Points; and I do hereby declare the lower roll in all of the passes, While in the following to be a full, clear, and exact deupper roll said groove is concentric to the scription of the invention, such as will enable axis of the roll throughout a portion of the to others skilled in the art to which it appertains circumference of the roll only, and then dito make and use the same. minishes gradually in depth and becomes My invention relates to the manufacture of eccentric, as shown at 1), Figs. 8 to 11, for the switch-points, and has for its object a reducpurpose of gradually pointing or reducing tion in the cost of making the article and prothe flange of the switch-point on one side, 15 ducing it complete and ready for use in a set and at the lower surface of the flange on the of rolls. same side of the rail is gradually tapered by In the manufacture of switch-points as herethe lateral contraction of the groove, as shown 6 5 tofore practiced it has been necessary to plane at c, Fig. 4. off both sides of the head and one of the flanges The groove d, which forms the head of the 20 011 its edge and bottom at one end of the secswitch-point, is concentric to the axis of the tion of rail from which the switch-point was roll in both the upper and lower roll throughmade to produce the proper taper required out a portion of its circumference, and is then to bring the point up against the rail of the reduced in depth gradually and made eccenmain track. This operation involved considtric to the axis of the rolls by a projection e 2 5 erable expense and loss of time. on the upper roll and by reducing the depth The invention willbe hereinafter described, of the groove at f for the purpose of graduand particularly pointed out in the claims. ally reducing the head of the switch-point on In the accompanying drawings, which form both sides of the web at one end thereof, as

part of this specification, Figure 1 represents shown in Figs. 5 and 6. The ribs g between 0 a front elevation of a pair of rolls for rolling the grooves, which form the head and flange switch-points; Fig. 2, a vertical longitudinal of the switch-point, are concentric to the axis section on a reduced scale; Fig. 3, an end of both rolls and form that portion of each View; Fig. 4, a plan; Fig. 5, a cross-sectional pass in the rolls which produces the web of end View of a finished switch-point; Fig. 6, a the switch-point, which is of uniform thick- 3 5 top or plan View of the same; Fig. 7, a section ness throughout its length.

of the rolls through the pass E; Fig. 8, a sec- The several passes are separated by collars tion through the passD; Fig. 9, a section 71., and in the passes D and E the terminal through the pass 0; Fig. 10, a section through point of the eccentric portion of the groove (1 I the pass 13, and Fig. 11 a section through the is contracted laterally by a projection i for 0 pass A. tapering the point vertically, as shown at 7t Reference being had to the drawings and in Fig. 5, and the recess Z in the point is the letters thereon, F indicates the upper and formed by the projection e in the pass E, which G the lower roll, which may be mounted in finishes the article.

- any suitable housing and geared to revolve In Figs. 5 and 6, m indicates the head, 92

45 together in the same direction by gearing the Web, and 0 the flange or base, of aswitchcommon to rolling-mills. In the rolls are point having the vertically-tapered portion 70 formed the passes A, B, C, D, and E, by passand the recess Z. In the several passes the 5 ing through which a bar or billet of metal is eccentric portions of the grooves spring from different points on the circumference or periphery of the rolls to correspond with and compensate for the degree of tapering of the switch-point produced by the preceding pass and to cause the rolls in one pass to bite. just at the place where they ceased to bite and reduce the point in the former pass. In turning the rolls only one center is used, and the eccentricity or taper of the passes is produced with the automatic cross-feed of the lathe. The collars 7L may be distributed upon the upper and lower roll, instead of all being on the lower roll, as shown, without departing from the spirit of my invention.

In the operation of the rolls described they revolve continuously in one and the same direction from the time the bar or billet of metal is introduced until the switch-point is completed, and the metal is fed into the several passes at the same point on the circumference of the rolls.

The feed mechanism consists of a series of feed-rolls a" h, operated by any suitable eonncction with the rolls, and a series of gates c-'one for each pass-mounted upon a rockshaft (1', supported in suitable bearings at each end and operated by an arm 6, secured to the shaft d at one end and at the opposite end to a rod or link 1", attached to one arm g'of a vibrating lever II. The lever ll is fulcrumed at 71 in a support 1', and its opposite arm 7: is provided with a cam-roller Z',which enters a groove on in a gear-wheel I, supported in a pedestal K and engaging with a pinion L, secured to one of the rolls.

The feed mechanism maybe geared to cause the gates to assume a horizontal position and allow the metal to enter the passes of the rolls at every revolution or at every other revolution of the rolls, or at any suitable number of revolutions, by regulating the gearing accordingly. The feed-rolls a i) run continuously, thereby'moving the metal up against the gates c and holding it in position ready to enter the passes of the rolls as soon as the gates are moved forward into ahorizontal po sition by the gearing and operating mechanism.

By the ctmstruction an d operation described a completed switch-point is produced capable of being placed in position in a switch without any further preparation.

Having thus fully described my invention, what I claim is- 1. Rolls for the manufacture of switchpoints, provided with a concentric groove for j the flange and an eccentric groove for the head in one roll, and eccentric grooves for the flange and head in the opposing roll, and concentric ribs between the grooves in both rolls, constituting one pass in the rolls, substantially as described.

2. Rolls for manufacturing switch-points, provided with a cam-shaped or eccentric projection, as c, on one roll and a corresponding part, as f, on the opposite roll, grooves, as a (i, to operate upon the head and flange of the switch-point, and concentric ribs, as g, to operate upon the web, substantially as described.

3. Rolls for manufacturing switch-points, provided with a pass or passes having grooves, as u d, and ribs, as g, and vertical and lateral projections in said grooves, as at 'i and c, for pointing or reducing a bar of metal at its upper frontend and forming a double incline on one of the flanges, substantially as described.

4. Rolls for manufacturing switch-points, provided with a series of passes having grooves, as a (Z, and ribs, as g, for forming the head, flanges, and web, and eccentric vertical and lateral projections, respectively, as shown at c, e, and i, for reducing the head to a point on both sides of the web and the flange on one side of the web, substantially as described.

5. Rolls for manufacturing switch-points, provided with grooves, as ct (I, having concentric portion throughout a part of the circumference of the rolls and concentric portions throughout the remainder of the circumference of the rolls, and a concentric rib, as g,between the grooves, whereby the article is rolled parallel throughout a part of its length and gradually tapered throughout the remainder of its length, substantially as described.

6. Rolls for manufacturing switch-points, provided with grooves, as u, d, the former bein g concentric to the axis in one roll throughout its circumference and concentric to the axis in the opposing roll throughout a portion of the circumference of said roll and eccentric throughout the remainder, and the latter groove being concentric to the axes of both rolls throughout a portion of the circumference thereof and eccentric to the axes of the rolls throughout the remaining portion thereof, substantially as described.

7. Rolls for manufacturing switch-points, provided with a series of passes having grooves, as (t and (Z, constructed substantially as described, and concentric ribs, as g, between said grooves, in combination with an automatic feed mechanism, substantially as and for the purpose set forth.

8. Rolls for manufacturing switch-points, having grooves provided with cam-shaped projections and recesses in the rolls, in combination with an automatic feed mechanism constructed to admit the metal to the several passes at the same point on the periphery of the rolls, substantially as described.

9. Rolls for manufacturing switch-points, in combination with a feed mechanism consisting of rolls, and a gate for opening and closing the entrance to the pass in the rolls, substantially as described.

10. Rolls for manufacturing switch-points, in combination with a feed mechanism consisting of rolls, a rock-shaft provided with gates, and a train of mechanism for interthe gear-wheel and the rock-shaft, substanmittently dropping and raising said gates, tially as described. I O substantially as described. In testimony whereof Iaffix my signature in 11. Rolls for manufacturing switch-points, presence of two Witnesses. 5 in combination with feed-rolls, arock-shaft ISAAC D. XVEAVER.

supportingv gates, at geanwheel having a cam- WVitnesses: shaped groove, a pinion engaging said gear- LEWIS REHR,

Wheel, and intermediate connection between J. F. ELLENBERGER. 

